Outback FXR2012A Operator's Manual page 60

Troubleshooting
Symptom Possible Cause
Incorrect input mode.
Inverter does not
Specific mode only offsets
perform the Offset
under particular conditions.
function when
expected.
Unusual voltage on System neutral and ground may
hot or neutral output not be bonded.
line.
Unusual and Inverter has not synchronized
different voltages on with input source.
AC hot input lines.
Erratic AC source voltage.
Inverter set to Search (Search
mode).
Loads drop out or
crash during transfer.
Loads sensitive to inverter's
transfer time. UPS mode not
in use.
Loads too large.
Undersized battery cables.
Unit reads AC input, Internal transfer relay may be
even though no damaged. May be
source is present. accompanied by AC Relay Fault
error and shutdown.
False reading due to noise.
9
See inside front cover of this manual.
60
Table 7 Troubleshooting
Possible Remedy
Offset does not function in Generator, UPS, and Backup modes.
Support mode will perform the Support function based on load.
This may appear as Offset without reaching the reference voltage.
GridZero mode will perform Offset based on the DoD Volts
setting. Other reference voltages are not used.
Test AC HOT OUT and AC NEUTRAL OUT terminals with AC
voltmeter. (See page 57.) These measurements should give full
voltage. Test neutral and ground connections. This measurement
should read zero volts. Any other result means neutral and ground
are not bonded correctly. If this is the case, the hot line often reads
60 to75 Vdc and the neutral reads 45 to 60 Vdc with respect to
ground. (If bonding is not required or is prohibited by national or
local codes, then no action may be required.)
MATE3 system display only: The
Inverter soft key may be erratic or inaccurate after initial
connection until the inverter has synchronized with the AC
source. This may require a short time.
Check AC voltage on the AC HOT IN and AC NEUTRAL IN
terminals. (See page 57.) If not consistent, the problem is external.
MATE3 system display only: AC source voltage may have dipped to a
low enough point to crash a sensitive load before the inverter could
take over. This can happen if the inverter's Grid AC Input Voltage
Limits or Gen AC Input Voltage Limits were turned down to
accommodate a problematic AC source. To make the inverter
respond sooner, raise the lower limit setting in the appropriate
menu. (If this setting was intentional, then no action is required.)
The unit will take a moment to come out of Search after transfer.
MATE3 system display only: If constant power is required, set to
ON with the INVERTER hot key. (If this setting was intentional,
then no action is required.)
MATE3 system display only: Most of the inverter's input modes
feature a small but noticeable response time during transfer.
Certain loads (such as highly sensitive computers) may not respond
well. The UPS input mode has a faster response time. (See page 21.)
The unit can transfer more power than it can invert. If loads are
oversized, the unit will falter or crash when switching to batteries.
Reduce the size of the loads.
Battery cables smaller than recommended will cause a significant
voltage drop when switching to batteries, acting like either an
overload or a low-battery condition. Size all cables correctly.
Disconnect AC input wires and turn inverter on. Test the AC HOT
OUT and AC NEUTRAL OUT terminals with an AC voltmeter. (See
page 57.) If voltage appears there, the transfer relay may be
jammed. Contact OutBack Technical Support.
Electrical noise can cause false readings on the metering circuits
when no voltage is present. The readings are usually less than
30 Vac. If this is the case, no action is required.
AC In
reading accessed by the
9
900-0167-01-00 Rev A